Humeral stem implant



FIG. 1 is a side perspective view of a first embodiment of a humeral stem implant embodying the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a first side view thereof; and,

FIG. 7 is a second side view thereof.

Broken lines are used to illustrate features of the humeral stem implant which form no part of the claimed design. 

CLAIM The ornamental design for a humeral stem implant, as shown and described. 